A floating metal blank forging die set

Abstract

The present invention discloses a floating metal blank forging die set, which relates to the technical field of metal blank forging and is used to solve the problem that during continuous forging and stamping of blanks in the same batch, the die frequently undergoes floating displacement and suffers serious self-wear. The present invention records the floating displacement that occurs during the die pressing process, and drives the first rotating arm to rotate through a stepping motor to adjust the position of the ball rod, simulating the angle and position adjustment during the die pressing process, controlling the docking of the die on the movable module and the fixed module. Without replacing the die, there is no need to frequently perform floating adjustment on blanks in the same batch, reducing excessive wear of the die and improving the overall service life. At the same time, by using the active adjustment of the ball rod, the floating adaptation range of the die installed at the bottom of the movable module can also be increased. Compared with the floating component with a fixed moving range, the overall forging and die-casting adaptability of the blank is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal blank forging, in particular to a floating metal blank forging die frame. Background Art

[0002] A floating metal billet forging die frame is a die support structure used in metal forging processes. During the forging process, when the metal billet is subjected to pressure from the upper die, the floating mechanism acts as a buffer. If there are certain deviations in the shape or size of the billet, or if there are fluctuations in the pressure of the forging equipment, the floating die frame can adapt to these changes through the elastic deformation of the floating mechanism, making the contact pressure between the die and the billet more uniform, thereby avoiding damage to the die or quality problems of the forging caused by excessive local pressure. For example, in patent publication number CN102228927A, upper and lower spherical support blocks are provided to fine-tune the position of the die before closing, and the arc surface docking position is changed to control the position of the die, thereby achieving the entire floating docking and avoiding damage to the die and punch caused by rigid contact.

[0003] For example, in the patent publication number CN218835823U, it is learned that the position of the mold is assisted by the needle calibration method during mold closing, and the position of the needle and the notch needs to be adjusted and fixed in advance. The floating mold improvement made in the above patent application lacks the automatic adjustment of the active deviation of the mold. It is adjusted by pre-position adjustment or by using the small range of floating that the mold can perform. This leads to frequent forging and extrusion of the blank, resulting in serious wear of the notch and the pad.

[0004] To this end, we propose a floating metal billet forging die set. Summary of the Invention

[0005] The object of the present invention is to provide a floating metal billet forging die frame to solve the problems raised in the above background technology;

[0006] To achieve the above object, the present invention provides the following technical solution: a floating metal billet forging die frame, comprising a lower die frame and an upper die frame, wherein the top of the lower die frame is slidably connected to the upper die frame, the bottom of the upper die frame is fixed to an upper die table by bolts, a ball column is movably connected to the upper die table, one end of the ball column passes through the upper die table and is movably connected to a movable die group, and an upper die is fixed to the movable die group by bolts;

[0007] The ball column is located on the top of the upper die table and is evenly sleeved with a second rotating arm. The top of the lower die frame is slidably connected to the lower die table, and a fixed die set is installed on the top of the lower die table.

[0008] A stepping motor is installed at the top of the upper die table and inside the upper die holder. The output end of the stepping motor is fixedly connected with a first rotating arm. One end of the first rotating arm is movably connected with a second rotating arm sleeved on the end of a ball column. A controller is installed on the side of the stepping motor at the top of the upper die table.

[0009] The controller installed on the upper die table is used to control the rotation of the first rotating arm by the stepping motors on both sides. It also includes a front-end recognition module and an action decision module. The front-end recognition module is used to obtain the relative coordinate information of the fixed module, and the action decision module is used for comparing the coordinate information data and sending out action signals.

[0010] Furthermore, steering rods are symmetrically and rotatably connected to the bottom of the upper die table. A sliding frame is movably connected to one side of the steering rod. One end of the ball column penetrates through the through groove on the sliding frame and is connected with a movable module.

[0011] Furthermore, pressure columns are evenly and symmetrically installed at the bottom of the upper die holder. A return spring is sleeved on the pressure column and on the top of the lower die table. One end of the pressure column penetrates through the lower die table and extends into the lower die holder.

[0012] Furthermore, lifting platforms are evenly fixed on the inner wall of the bottom of the lower die holder. The telescopic tooth columns on the lifting platforms abut against the bottom of the lower die table. Tooth shafts are symmetrically and movably connected to the inner walls on both sides of the lower die holder. Gears are sleeved on the tooth shafts and meshed with the telescopic tooth columns on the lifting platforms. The other side of the gears sleeved on the tooth shafts is meshed with the tooth patterns on the side of the pressure column.

[0013] The usage method of this floating metal blank forging die holder is as follows:

[0014] According to the forging of batch blanks, the position of the movable module is adjusted adaptively. A single blank is placed in the cavity of the movable module. The hydraulic component pushes the upper die holder downward to contact the lower die holder. The movable module at the bottom of the upper die table starts to contact the blank on the lower die table. Affected by the abutment of the outer wall of the blank, the movable module adaptively adjusts its own deflection angle. The ball column drives the two second rotating arms at the top to move. Along with the rotation of the second rotating arms, the first rotating arms on the stepping motors on both sides rotate passively. The controller obtains and stores the deflection angle information of the first rotating arms on the stepping motors. And when the subsequent blanks are forged and extruded, the controller actively controls the stepping motors to rotate the first rotating arms at the same angle, realizing the movement of the movable module and avoiding the floating fitting of the die by means of contact extrusion.

[0015] Indentation speed-up type blank forging extrusion. Along with the movement of the upper die holder, the pressure column starts to squeeze the return spring and at the same time drives the tooth shaft in the lower die holder to rotate, pushing out the tooth column on the lifting platform. When contacting the lower die table, the entire fixed module is pushed upward. Along with the downward movement of the movable module, the two move synchronously and towards each other, shortening the stamping and forging time. At the same time, it is convenient for the abutting column installed in the fixed module to push out the blank after the profiling is completed.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, a power mechanism is assembled on the original floating module. The floating displacement occurring during the die pressing process is recorded, and the position of the ball rod is adjusted by driving the first rotating arm to rotate through a stepping motor, simulating the angle and position adjustment during the die pressing process, and controlling the docking of the dies on the movable module and the fixed module. Without replacing the die, frequent floating adjustment of blanks in the same batch is likely to cause excessive wear of the die, reducing the overall service life. At the same time, by actively adjusting with the ball rod, the floating adaptation range of the die installed at the bottom of the movable module can also be increased. Compared with the floating component with a fixed moving range, the overall forging and die-casting adaptability to the blank is improved;

[0018] In the present invention, following the movement of the subsequent pressure column and the upper die holder, while moving downward, the rotation of the gear shaft is achieved through the side tooth pattern of the pressure column, and the upper column body on the lifting platform is pushed upward in the reverse direction, driving the entire lower die table to move upward. The fixed module installed on the lower die table and the movable module at the bottom of the upper die table start to move towards each other. In comparison, with the full-path extrusion contact of the upper die table and the synchronous movement on both sides, the contact time between the die and the blank is shortened, improving the overall forging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the floating metal blank forging die holder of the present invention;

[0020] Figure 2 is a schematic front view structure diagram of the floating metal blank forging die holder of the present invention;

[0021] Figure 3 is a schematic diagram of the installation structure of the stepping motor on the upper die table of the present invention;

[0022] Figure 4 is a schematic diagram of the installation structure of the movable module on the carriage of the present invention;

[0023] Figure 5 is a schematic diagram of the connection structure between the first rotating arm and the second rotating arm at the end of the ball column of the present invention;

[0024] Figure 6 is a schematic diagram of the connection structure between the steering rod and the carriage of the present invention;

[0025] Figure 7 is a schematic diagram of the installation structure of the lifting platform inside the lower die holder of the present invention.

[0026] In the figure: 1. Lower die holder; 2. Lower die table; 3. Upper die holder; 4. Upper die table; 5. Movable module; 6. Stepping motor; 7. First rotating arm; 8. Ball column; 9. Second rotating arm; 10. Steering rod; 11. Carriage; 12. Fixed module; 13. Pressure column; 14. Return spring; 15. Lifting platform; 16. Gear shaft. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1-7 , the present invention provides a technical solution:

[0029] Example 1: Floating metal billet forging die frame. Usually, during forging, the metal billet is placed on the lower die block, and the upper die block moves downward again under the drive of the press slide. The upper die block gradually approaches the lower die block and applies pressure to the metal billet, causing it to undergo plastic deformation. Since the upper die block is connected to the lower die block by a limit rod and a spring, under the action of the forging force, the upper die block can float to a certain extent as needed to adapt to the deformation and flow of the metal billet, making the forging process more stable and smooth. The floating design of the upper die block and the elastic buffering of the spring can effectively absorb and alleviate the impact force during the forging process, reduce damage to the die and equipment, and extend the service life of the die and equipment. However, considering high-frequency forging without die replacement, the continuous floating transfer of the upper die block causes long-term impact and friction between the upper die block and the contact side of the billet, resulting in more or less wear and tear.

[0030] For this purpose, relative to the floating upper die seat, by installing the floating component of the upper die table 4, an active control unit is applied, and the movable module 5 installed at the bottom is automatically calibrated according to the continuous forging of the same batch of blanks, so as to avoid damage to the floating component on the upper die table 4 caused by frequent movement;

[0031] like Figure 1 and Figure 2 The floating metal billet forging die frame shown in the figure is composed of a lower die frame 1 and an upper die frame 3, wherein the top of the lower die frame 1 is slidably connected to a lower die table 2, which is used for die installation and position adjustment, and the bottom of the upper die frame 3 is fixed with an upper die table 4. Figure 3 and Figure 4 As shown, a single-side floating docking method is adopted. Here, the ball column 8 is installed on the upper mold platform 4, and then the movable module 5 connected at the bottom is adjusted accordingly through the movement of the ball column 8, and finally the position adjustment of the entire mold is achieved;

[0032] A structure with a positioning pin and a positioning hole in cooperation is arranged between the upper die set 3 and the lower die set 1. Generally, the clearance is controlled within 0.05 - 0.1 mm, which can effectively limit the lateral displacement of the die during butt joint, ensuring the accurate butt joint of the upper and lower dies. However, there are inevitably errors in the manufacturing and assembly of die parts, and these errors may lead to inaccurate fitting between parts. The floating structure can adaptively adjust the position within a certain range to compensate for these errors, ensuring better fitting of all parts of the die, improving the forming accuracy, and at the same time, it can also adapt to the thermal expansion and contraction errors between the die and the positioning mechanism. As Figure 3 shown, a stepping motor 6 is fixedly connected to the top of the upper die table 4. A first rotating arm 7 is fixedly connected to the end of the stepping motor 6. A second rotating arm 9 is sleeved on the end of the ball column 8. The first rotating arm 7 is movably connected to the second rotating arm 9 correspondingly. Along with the rotation of the two side stepping motors 6, the first rotating arm 7 drives the second rotating arm 9 to rotate and at the same time pushes the entire ball column 8 to swing, and the movable module 5 abutted on the other side of the ball column 8 moves in the opposite direction, realizing the adjustment of the position of the die fixed at the bottom of the entire movable module 5;

[0033] A controller is installed on the side of the upper die table 4. The controller installed on the upper die table 4 is used to control the rotation of the first rotating arm 7 driven by the two side stepping motors 6. Since it is a fine adjustment of the die position, when forging and extruding the blank, without adjusting the die position, when the upper die contacts the blank, due to the mobility of the entire movable module 5, the upper die and the lower die adaptively cover and fit. Relative to this, the entire movable module 5 is deflected passively at an angle, which is fed back to the second rotating arm 9 at the top through the ball column 8. The rotation of the second rotating arm 9 drives the rotation of the first rotating arm 7. At this time, the controller can obtain the rotation angle values of the first rotating arms 7 on the two side stepping motors 6, and thus calculate the passive migration amount of the entire movable module 5;

[0034] The entire controller further includes a front-end recognition module and an action decision module. The front-end recognition module is used to obtain the relative coordinate information of the fixed module 12. The action decision module is used for coordinate information data comparison and the issuance of action signals. By using the positioning holes on the lower die set 1 and the positioning pins installed on the upper die set 3, a coordinate system is constructed with the positioning hole as the center. The front-end recognition module can clearly understand the coordinate of the blank installation position. Without changing the die, the placement coordinates of the blanks in the same batch remain unchanged. After comparison by the action decision module, it is fed back to the controller. When placing another blank die, the controller can actively control the two side stepping motors 6 to rotate, pushing the movable module 5 connected to the entire ball column 8 to perform fine position adjustment;

[0035] Compared with the position adjustment during contact, the automatic position adjustment using the floating component avoids the long-term contact and friction between the die and the blank, extending the service life of the entire die;

[0036] Meanwhile, to improve the stability of the entire movable module 5 during movement, steering rods 10 are symmetrically and movably connected to the bottom of the upper die table 4. As Figure 4 shown, a carriage 11 is movably connected to the steering rod 10. One end of the ball column 8 passes through the carriage 11 and is connected to the movable module 5. The top of the movable module 5 abuts against the channel on the carriage 11. As the movable module 5 moves, it will drive the carriage 11 to move, improving the movement stability of the entire movable module 5;

[0037] Through active and stable automatic position calibration, compared with the frequently moving floating components, the protection of the entire mold is improved. At the same time, when replacing the mold, the controller installed on the upper die table 4 can also automatically adjust the storage position of the movable module 5 through the front-end recognition module, avoiding the floating components reaching the critical value and being unable to correct the mold position in time when the positioning fails, resulting in mold collision damage. Here, the front-end recognition module is a laser sensor, which can obtain the precise position and distance information of an object by emitting a laser beam and measuring the time of the reflected light.

[0038] Embodiment 2: To improve the forging efficiency of the entire floating metal blank, the lower die table 2 on the top of the lower die holder 1 is movably arranged. At the same time, the pressure columns 13 uniformly fixed at the bottom of the upper die holder 3 extend into the lower die holder 1. As Figure 7 shown, when the mold is not pressed together, the pressure columns 13 are abutted through the return springs 14. At the same time, the gear shaft 16 installed in the lower die holder 1 drives the column on the lifting platform 15 to abut against the lower die table 2;

[0039] With the subsequent movement of the pressure column 13 and the upper die holder 3, while moving downward, the gear shaft 16 is rotated through the side tooth pattern of the pressure column 13, and the column on the lifting platform 15 is pushed upward in the reverse direction, pushing the entire lower die table 2 upward. The fixed module 12 installed on the lower die table 2 and the movable module 5 at the bottom of the upper die table 4 start to move towards each other. In comparison, with the full-path extrusion contact of the upper die table 4, the synchronous movement on both sides shortens the contact time between the mold and the blank, improving the overall forging efficiency.

[0040] The working principle of the present invention: According to the forging of a batch of blanks, the adaptive position of the movable module 5 is adjusted. A single blank is placed in the chamber of the movable module 5. The hydraulic component pushes the upper die holder 3 downward to contact the lower die holder 1. The movable module 5 at the bottom of the upper die table 4 starts to contact the blank on the lower die table 2. Affected by the abutment of the outer wall of the blank, the movable module 5 adaptively adjusts its own deflection angle. The ball column 8 drives the two rotating arms II 9 at the top to move. Along with the rotation of the rotating arm II 9, the rotating arm I 7 on the two side stepping motors 6 rotates passively. The controller obtains the deflection angle information of the rotating arm I 7 on the stepping motor 6 and stores it. And when the subsequent blank is forged and extruded, the controller actively controls the stepping motor 6 to rotate the rotating arm I 7 at the same angle, realizing the movement of the movable module 5 and avoiding the mold floating and fitting through the contact extrusion method;

[0041] Indentation speed-up blank forging extrusion. As the upper die holder 3 moves, when the pressure column 13 starts to extrude the return spring 14, it simultaneously drives the internal gear shaft 16 in the lower die holder 1 to rotate, pushing out the tooth column on the lifting platform 15. When it contacts the lower die table 2, it pushes the entire fixed module 12 upward. As the movable module 5 moves downward, the two move synchronously and towards each other, shortening the stamping and forging time. At the same time, it is convenient for the abutting column installed in the fixed module 12 to push out the blank after the stamping is completed.

[0042] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should fall within the protection scope of the present invention.

[0043] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0044] The above disclosed preferred embodiments of the present invention are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all details and do not limit the invention to only the specific implementation manners. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art of this technology can well understand and utilize the present invention. The present invention is only limited by the claim book and its full scope and equivalents.

Claims

1. A floating metal billet forging die frame, comprising a lower die frame (1) and an upper die frame (3), wherein the top of the lower die frame (1) is slidably connected to the upper die frame (3), characterized in that: The bottom of the upper mold frame (3) is fixed with an upper mold base (4) by bolts, a ball column (8) is movably connected inside the upper mold base (4), one end of the ball column (8) passes through the upper mold base (4) and is movably connected with a movable mold group (5), and an upper mold is fixed to the movable mold group (5) by bolts; The ball column (8) is located on the top of the upper die table (4) and is sleeved with a second rotating arm (9); the top of the lower die frame (1) is slidably connected to the lower die table (2); and a fixed die set (12) is installed on the top of the lower die table (2); A stepper motor (6) is installed on the top of the upper die table (4) and located in the upper die frame (3); the output end of the stepper motor (6) is fixedly connected to a rotating arm 1 (7); one end of the rotating arm 1 (7) is movably connected to the end of the ball column (8) by a rotating arm 2 (9) sleeved thereon; a controller is installed on the side of the stepper motor (6) on the top of the upper die table (4); The controller installed on the upper die table (4) is used for the stepping motors (6) on both sides to drive the rotating arm (7) to rotate and control, and also includes a front-end recognition module and an action decision module. The front-end recognition module is used to obtain the relative coordinate information of the fixed module (12), and the action decision module is used to compare the coordinate information data and send the action signal.

2. A floating metal billet forging die frame according to claim 1, characterized in that: The bottom of the upper die table (4) is symmetrically rotatably connected to a steering rod (10), one side of the steering rod (10) is movably connected to a slide (11), and one end of the ball column (8) passes through the upper slot of the slide (11) and is connected to the movable die set (5).

3. A floating metal billet forging die frame according to claim 2, characterized in that: A pressure column (13) is evenly and symmetrically installed at the bottom of the upper mold frame (3), and a return spring (14) is sleeved and installed on the pressure column (13) and located on the top of the lower mold platform (2). One end of the pressure column (13) passes through the lower mold platform (2) and extends into the lower mold frame (1).

4. A floating metal billet forging die frame according to claim 3, characterized in that: A lifting platform (15) is evenly fixed on the inner wall of the bottom of the lower mold frame (1), and the telescopic tooth column on the lifting platform (15) abuts against the bottom of the lower mold frame (2). The inner walls on both sides of the lower mold frame (1) are symmetrically and movably connected with a gear shaft (16), and a gear sleeved on the gear shaft (16) is meshed with the telescopic tooth column on the lifting platform (15), and the other side of the gear sleeved on the gear shaft (16) is meshed with the side tooth pattern of the pressure column (13).

5. A floating metal billet forging die set according to claim 4, characterized in that: The method of using the floating metal billet forging die set is as follows: According to the batch blank forging, the movable module (5) is adaptively adjusted in position, and a single blank is stored in the movable module (5) chamber. The hydraulic assembly pushes the upper die frame (3) downward to contact the lower die frame (1), and the movable module (5) at the bottom of the upper die table (4) begins to contact the blank on the lower die table (2). Abutted by the outer wall of the blank, the movable module (5) adaptively adjusts its own deflection angle, and the ball column (8) drives the two rotating arms (9) at the top to move. With the rotation of the rotating arm (9), the rotating arms (7) on both sides of the stepping motor (6) passively rotate. The controller obtains the deflection angle information of the rotating arms (7) on the stepping motor (6) and stores it. When the blank is subsequently forged and extruded, the controller actively controls the stepping motor (6) to rotate the rotating arms (7) at the same angle, thereby realizing the movement of the movable module (5) and avoiding the floating fitting of the mold by contact extrusion. In the retracted speed-up billet forging extrusion, as the upper die frame (3) moves, the pressure column (13) starts to squeeze the return spring (14) and drives the inner gear shaft (16) of the lower die frame (1) to rotate, pushing out the upper gear column of the jacking platform (15), contacting the lower die table (2) and pushing the entire fixed die set (12) upward, and as the movable die set (5) moves downward, the two move synchronously towards each other, shortening the stamping forging time, and at the same time facilitating the installation of the inner support column of the fixed die set (12) to push out the blank after the stamping is completed.

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